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Laminating resin composition and multilayer structure

a technology of synthetic resin and composition, applied in the field of laminate resin composition and multi-layer structure, can solve the problems of lowering the adhesion of the available laminate layer to the substrate, lowering the tear strength, etc., and achieve the effect of excellent lamination process productivity and reduced production cos

Active Publication Date: 2012-09-04
MITSUI CHEM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides laminating resin compositions that improve productivity in lamination processes and maintain the optical and surface properties of polyolefin resins. These compositions contain a polyolefin resin and a specific polyethylene wax, which prevents deterioration in properties and allows for high tear strength in multilayer structures. The resin composition has a polyolefin resin and a polyethylene wax with specific properties, such as density and molecular weight. The composition can be used to produce multilayer structures with excellent tear strength compared to structures made from polyolefin resin alone.

Problems solved by technology

However, the obtainable laminate layers show lowered adhesion to substrates and lowered tear strength.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0165]100 Parts by mass of the polyolefin resin and 3 parts by mass of a polyethylene wax (EXCEREX 30200BT manufactured by Mitsui Chemicals, Inc.) were mixed together and were supplied to a 65 mm-diameter single-screw extruder. The mixture was melt-kneaded at a resin temperature of 270° C. and was extruded through a T-die on a biaxially stretched polypropylene film substrate at a line speed of 70 m / min, a thickness of 20 μm and a width of 620 mm, thereby producing a lamination film. The properties of the film were measured, the results being set forth in Table 2.

example 2

[0166]A lamination film was produced in the same manner as in Example 1, except that the polyethylene wax was replaced by the polyethylene wax (1). The results are set forth in Table 2.

example 3

[0167]A lamination film was produced in the same manner as in Example 1, except that the polyethylene wax was replaced by the polyethylene wax (2). The results are set forth in Table 2.

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Abstract

Laminating resin compositions of the invention enable excellent productivity in the lamination processes, and are free from deterioration in optical characteristics such as transparency or surface properties inherent to resins such as polypropylenes. Multilayer structures obtained by laminating the composition on a substrate have tear strength which is as high as that of multilayer structures obtained by simply laminating a polyolefin resin such as polypropylene on a substrate. The laminating resin composition includes a polyolefin resin and a polyethylene wax having a density in the range of 890 to 955 kg / m3 as measured by a density gradient tube method in accordance with JIS K 7112 and a number average molecular weight (Mn) in terms of polyethylene in the range of 500 to 2900 as measured by gel permeation chromatography (GPC).

Description

FIELD OF THE INVENTION[0001]The present invention relates to laminating synthetic resin compositions that are laminated on substrates, and multilayer structures that have a laminate layer formed from the composition.BACKGROUND OF THE INVENTION[0002]It is a conventional practice to provide laminate layers on the surface of substrates produced from materials such as metals, paper, wood materials and plastics for the purpose of surface protection or surface modification. Polypropylenes, which have good transparency, chemical resistance and heat resistance, are excellent laminating materials for the production of laminate layers. For example, Patent Document 1 discloses that a polypropylene is blended with a high-pressure low-density polyethylene and an amorphous α-olefin copolymer to minimize the deterioration in forming properties such as uneven thickness known as a surge while achieving higher transparency.[0003]Meanwhile, there has been a greater demand for improved productivity in ...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): C08K5/01C08F210/00
CPCB32B27/32C08L23/02C08L23/12C08L23/142C08L23/06C08L91/06C08L2205/02C08L2666/06C08K5/098C08K5/10C08L23/0815C08L2207/066B32B5/022B32B5/024B32B7/12B32B15/08B32B15/20B32B21/08B32B27/08B32B27/10B32B27/12B32B27/18B32B27/20B32B27/22B32B27/302B32B27/304B32B27/306B32B27/308B32B27/34B32B27/36B32B27/365B32B2255/10B32B2255/20B32B2255/205B32B2255/26B32B2270/00B32B2307/306B32B2307/412B32B2307/50B32B2307/514B32B2307/5825B32B2307/702B32B2307/714B32B2307/72
Inventor KAWABE, KUNIAKIUOSAKI, HIROTAKAYASUI, MOTOYASUNAKAMURA, HIDEOAMADA, YASUSHIOHGA, AKIHITO
Owner MITSUI CHEM INC
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